Roof vent



FIG. 1 is an isometric view of a roof vent showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a cross sectional view of the roof vent cover. 

The ornamental design for a roof vent, as shown. 